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Santos,Elcio Ferreira dos; Zanchim,Bruno José; Campos,Aline Grella de; Garrone,Raphael Florencio; Lavres Junior,José. |
Few studies in Brazil have addressed the need for micronutrients of physic nut focusing on physiological responses, especially in terms of photosynthesis. The objective of this study was to evaluate the effects of omission of boron (B), copper (Cu), iron (Fe), manganese (Mn) and zinc (Zn) on Jatropha curcas L.. The experimental design was a randomized block with four replications. The treatments were complete solution (control) and solution without B, Cu, Fe, Mn, and Zn. We evaluated the chlorophyll content (SPAD units), photosynthetic rate, dry matter production and accumulation of micronutrients in plants, resulting from different treatments. The first signs of deficiency were observed for Fe and B, followed by Mn and Zn, while no symptoms were observed... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jatropha curcas L.; Nutritional status; Dry matter; IRGA; SPAD. |
Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500022 |
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Santos,Elcio Ferreira; Macedo,Fernando Giovannetti; Zanchim,Bruno José; Camacho,Marcos Antonio; Lavres,José. |
ABSTRACT Jatropha seeds oil can replace fossil fuels, but the nutrient supply management for this species is not fully described. The objective with this work was to establish curves of macronutrient (nitrogen - N; phosphorus - P; potassium - K; calcium - Ca; magnesium - Mg and sulfur - S) content in leaves, stem and roots, and to evaluate the relative growth rate (RGR), absolute growth rate (AGR) and the foliar mass ratio (FMR). The experiment was arranged in completely randomized design with five replications. Jatropha plants were grown in nutrient solution and collected at intervals of 14 up to 119 days after treatments started. The period of highest uptake of nutrients occurred from 7 to 35 days after treatments started, which coincides with highest... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jatropha curcas; Nutrient uptake; Relative growth rate; Macronutrients uptake curves; Macronutrient uptake rates. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000400565 |
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